An air purifier wind cap-based control system and method

Abstract

The invention discloses a control system and method based on an air purifier hood, which belongs to the technical field of air purifiers and aims at solving the problem of poor hood projection angle and hood air outlet adjustment effect of the air purifier. The invention comprises a data acquisition module for collecting external environmental data; a main control module for controlling the hood projection angle and hood wind speed according to the external environmental data taken by the data acquisition module; and a component execution unit for executing the adjustment of the hood projection angle and hood wind speed. The present invention enables the anemometer and air quality sensor to monitor and store weather temperature and humidity through the setting of the data acquisition module, thereby performing data transmission and logical control on the fan and hood system inside the air purifier, so that the fan and hood can operate to achieve internal air sterilization and gas outlet and exhaust operations, thereby ensuring better air outlet effect of the air outlet.

Description

Technical Field

[0001] The present invention belongs to the technical field of air purifiers, and in particular relates to a hood control system and method based on an air purifier. Background Art

[0002] Air purifier, also known as "air cleaner", air freshener, or purifier, refers to a household appliance that can absorb, decompose or transform various air pollutants (generally including PM2.5, dust, pollen, odor, decoration pollution such as formaldehyde, bacteria, allergens, etc.), and effectively improve air cleanliness. It is mainly divided into household, commercial, industrial, and building applications.

[0003] In the existing technology, when an air purifier is used, the fan sucks in polluted air from all around and discharges it directly into the air after purification. Due to the different use of air indoors and outdoors, when ventilation is poor, the total number of bacteria is high, and the microorganisms attached to indoor suspended particles and saliva and sputum droplets contain a certain number of pathogenic microorganisms. Therefore, it is necessary to control the flow of internal air. At the same time, when the internal air is circulated, the existing air guide structure is straight-cylinder, which results in a small ventilation volume of the air purifier, which cannot meet the use requirements of large spaces.

[0004] Therefore, a control system and method based on an air purifier hood is needed to solve the problems of poor hood projection angle and hood air outlet adjustment effect of the air purifier in the prior art. Summary of the Invention

[0005] The object of the present invention is to provide a control system and method based on an air purifier hood to solve the problems raised in the above background technology.

[0006] To achieve the above objectives, the present invention provides the following technical solutions: a hood control system based on an air purifier, comprising:

[0007] Data acquisition module, used to collect external environmental data;

[0008] The main control module controls the hood projection angle and hood outlet wind speed according to the external environment data collected by the data acquisition module;

[0009] A component execution unit, used for adjusting the hood projection angle and the hood outlet wind speed;

[0010] The data acquisition module includes an anemometer, an air quality sensor, and a rain and snow sensor;

[0011] The component execution unit includes a servo drive module, a damper execution module, and a fan module. The servo drive module is used to control the rotation angle of the hood, the damper execution module controls the opening and closing of the hood opening, and the fan module controls the operation of the fan.

[0012] The main control module is internally provided with a PLC control system, and the component execution unit is controlled by the PLC control system.

[0013] It should be noted in the solution that the air valve execution module is an actuator for controlling the air valve, and the hood adjustment angle is calculated based on the hood base angle, hood projection angle and airflow deflection angle data. The main control module will calculate and adjust the hood projection angle based on the uploaded data information, and the fan module will drive the fan to operate again. The servo drive module drives the hood to rotate to the newly calculated projection angle based on the average wind speed and direction value of the anemometer over a period of time, and cycles in this way, with a cycle of adjusting the projection angle every 30 minutes of operation.

[0014] It is worth mentioning that the hood angle calculation method is:

[0015] Coordinate system and initial position definition: The center of the hood inlet is the coordinate origin O; the projection of the line connecting the center of the hood outlet and the center of the inlet in the horizontal plane is defined as the X-axis, with the positive direction from the inlet to the outlet;

[0016] The Y axis is perpendicular to the X axis; the Z axis is perpendicular to the XY plane, with the positive direction being vertically upward; the wind direction angle α is defined as the angle between the wind direction and the X axis;

[0017] The angle that the hood needs to rotate (around the Z axis) is defined as β;

[0018] The initial wind direction angle is 0°, the target point is in the XZ plane, and the wind hood is initially pointing to the target point.

[0019] It should be further explained that the steps for calculating the hood projection angle are as follows:

[0020] 1. Calculate the equipment reference angle between the national control point and the equipment point based on their longitude and latitude coordinates;

[0021] 2. Calculate the average wind speed and direction value A per unit time based on the monitoring data of the anemometer;

[0022] 3. Calculate the angle α between the average wind speed and direction per unit time and the equipment reference angle;

[0023] According to the hood projection angle calculation formula β=Aα, after β is calculated, the hood rotates to a preset position.

[0024] As a preferred embodiment, the airflow deflection angle calculation method is:

[0025] Calculation conditions: Ambient wind speed 3m / s, the horizontal distance between the target point and the device is approximately 130 meters;

[0026] Through CFD simulation, the deflection angle of the airflow landing point is calculated based on the ambient wind effect at different angles on the hood jet;

[0027]

[0028]

[0029] When δ is within the range of 0-45°, the γ angle and the δ angle can be approximately fitted into a linear relationship, γ = a × δ.

[0030] As a preferred embodiment, the steps for calculating the hood projection angle are as follows:

[0031] 1. Calculate the equipment reference angle between the national control point and the equipment point based on their longitude and latitude coordinates;

[0032] 2. Calculate the average wind speed and direction value A per unit time based on the monitoring data of the anemometer;

[0033] 3. Calculate the angle α between the average wind direction angle per unit time and the equipment reference angle;

[0034] According to the hood projection angle calculation formula β=Aα, after calculating β, the hood rotates to the specified position.

[0035] As a preferred embodiment, when the average wind speed of the wind cap is greater than 4m / s when the equipment is running, the fan equipment will stop running.

[0036] As a preferred embodiment, the method comprises the following steps:

[0037] Step 1: Collect external data through anemometers, air quality sensors, and rain and snow sensors, and transmit and store them;

[0038] Step 2: Based on the real-time collected environmental data, when the air quality and wind speed and direction meet the equipment operating conditions, the purifier will automatically turn on;

[0039] Step 3: The damper actuator will confirm whether the damper is open, and the servo drive module will confirm whether the hood has rotated to the specified angle. When the damper and hood reach the correct position, the fan will start to run.

[0040] Step 4: After the fan is turned on normally, the internal IFD and CNT high-voltage power module group will start to enter the dust removal working mode.

[0041] As a preferred embodiment, the hood opening on the outside of the hood is provided with an electric air valve, and the opening and closing of the hood is controlled by whether the electric air valve actuator is energized. The hood adopts a square outlet form and a slewing bearing driven by a servo motor to drive the hood to run to a calculated angle. An electric louver air valve is installed at the hood outlet to control and adjust the blowing direction of the hood opening. A drainage pipe is provided on the top of the hood for downward drainage of water.

[0042] As a preferred embodiment, the rotation mechanism of the hood is driven by a servo motor, the PLC uses the CANOPEN bus to control the rotation angle of the servo, and reads the servo motor operating status in real time through the bus. The calculation of the hood projection angle needs to be combined with the average wind speed and direction values on site.

[0043] Compared with the prior art, the present invention provides an air purifier hood control system and method, which has at least the following beneficial effects:

[0044] (1) Through the setting of the data acquisition module, the anemometer and air quality sensor can monitor and store the weather temperature and humidity, thereby transmitting data and performing logical control on the fan and hood system inside the air purifier, so that the fan and hood can operate, achieve the sterilization of the internal air and the air outlet and exhaust operation of the gas, thereby ensuring a better air outlet effect.

[0045] (2) The hood’s automatic power-off function effectively prevents rain and snow from entering through the hood opening after an unexpected power outage. At the same time, the hood’s projection angle and angle can be adjusted, making it easy to adjust the wind direction during use, thereby improving the hood’s air outlet effect and allowing the air to be blown toward the target area. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 It is a schematic diagram of the system flow structure of the present invention;

[0047] Figure 2 This is a schematic diagram of the method steps of the present invention;

[0048] Figure 3 It is a schematic diagram of the execution steps of the present invention;

[0049] Figure 4 This is a schematic diagram of the hood corner structure of the present invention;

[0050] Figure 5 Schematic diagram of the hood shape structure of the present invention

[0051] Figure 6 It is a schematic diagram of the broken line structure of the angle between the ambient wind and the hood of the present invention. DETAILED DESCRIPTION

[0052] The present invention will be further described below with reference to the embodiments.

[0053] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0054] The following examples are intended to illustrate the present invention but are not intended to limit the scope of protection of the present invention. The conditions in the examples may be further adjusted according to specific conditions. Simple improvements to the method of the present invention within the scope of the present invention are also within the scope of protection claimed in the present invention.

[0055] See also Figure 1-6 The present invention provides a hood control system for an air purifier, comprising:

[0056] Data acquisition module, used to collect external environmental data;

[0057] The main control module controls the hood projection angle and hood outlet wind speed according to the external environment data read by the data acquisition module;

[0058] A component execution unit, used for adjusting the hood projection angle and the hood outlet wind speed;

[0059] The data acquisition module includes an anemometer, an air quality sensor, and a rain and snow sensor;

[0060] The component execution unit includes a servo drive module, a damper execution module, and a fan module. The servo drive module is used to control the rotation angle of the hood, the damper execution module controls the opening and closing of the hood opening, and the fan module controls the operation of the fan.

[0061] The main control module is internally provided with a PLC control system, and the component execution unit is controlled by the PLC control system.

[0062] Perform the above steps to run the device.

[0063] Furthermore, it is worth specifying that the air valve execution module is an actuator for controlling the air valve, and the hood adjustment angle is calculated based on the hood base angle, hood projection angle and airflow deflection angle data. The main control module will calculate and adjust the hood projection according to the uploaded data information, and the fan module will drive the fan to operate again. The servo drive module drives the hood to rotate to the newly calculated projection angle according to the average wind speed and direction value of the anemometer over a period of time, and cycles in this way, with a cycle of adjusting the projection angle every 30 minutes of operation.

[0064] Furthermore, it is worth specifying that the hood angle calculation method is:

[0065] Coordinate system and initial position definition: The center of the hood inlet is the coordinate origin O; the projection of the line connecting the center of the hood outlet and the center of the inlet in the horizontal plane is defined as the X-axis, with the positive direction from the inlet to the outlet;

[0066] The Y axis is perpendicular to the X axis; the Z axis is perpendicular to the XY plane, with the positive direction being vertically upward; the wind direction angle α is defined as the angle between the wind direction and the X axis;

[0067] The angle that the hood needs to rotate (around the Z axis) is defined as β;

[0068] The initial wind direction angle is 0°, the target point is in the XZ plane, and the wind hood is initially pointing to the target point.

[0069] Furthermore, it is worthwhile to explain in detail that the steps for calculating the hood projection angle are as follows:

[0070] 1. Calculate the equipment reference angle between the national control point and the equipment point based on their longitude and latitude coordinates;

[0071] 2. Calculate the average wind speed and direction value A per unit time based on the monitoring data of the anemometer;

[0072] 3. Calculate the angle α between the average wind speed and direction per unit time and the equipment reference angle;

[0073] According to the hood projection angle calculation formula β=Aα, after β is calculated, the hood rotates to a preset position.

[0074] Furthermore, it is worthwhile to explain in detail the method for calculating the airflow deflection angle:

[0075] Calculation conditions: Ambient wind speed 3m / s, the horizontal distance between the target point and the device is approximately 130 meters;

[0076] Through CFD simulation, the deflection angle of the airflow landing point is calculated based on the ambient wind effect at different angles on the hood jet;

[0077]

[0078]

[0079] When δ is within the range of 0-45°, the γ angle and the δ angle can be approximately fitted into a linear relationship, γ = a × δ.

[0080] Furthermore, it is worthwhile to explain in detail that the hood adjustment angle is calculated as follows:

[0081] When the wind direction angle changes from 0° to α, the hood needs to be adjusted to β. To ensure that the airflow falls at the target point, α and β must satisfy the following formula: β = × (α + β), that is,

[0082]

[0083] The hood angle adjustment direction is opposite to the wind direction angle;

[0084] The hood adjustment angle range is [-45°~45°]. If it exceeds this range, adjust to -45° or 45°.

[0085] Furthermore, it is worthwhile to specifically explain that the method includes the following steps:

[0086] Step 1: Collect external data through anemometers, air quality sensors, and rain and snow sensors, and transmit and store them;

[0087] Step 2: Based on the real-time collected environmental data, when the air quality and wind speed and direction meet the equipment operating conditions, the purifier will automatically turn on;

[0088] Step 3: The damper actuator will confirm whether the damper is open, and the servo drive module will confirm whether the hood has rotated to the specified angle. When the damper and hood reach the correct position, the fan will start to run.

[0089] Step 4: After the fan is turned on normally, the internal IFD and CNT high-voltage power module group will start to enter the dust removal working mode.

[0090] Furthermore, it is worth specifying that when the average wind speed of the wind cap is greater than 4m / s during operation of the device, the fan device will stop running.

[0091] Furthermore, it is worth specifying that an electric damper is provided at the hood opening on the outside of the hood, and the opening and closing of the hood are controlled by whether the electric damper actuator is energized. The hood adopts a square outlet form and adopts a servo motor-driven slewing bearing to drive the hood to move to a calculated angle. An electric louver damper is installed at the hood outlet to control and adjust the blowing direction of the hood opening. A drainage pipe is provided on the top of the hood for downward drainage of water.

[0092] Furthermore, it is worth specifying that the rotation mechanism of the hood is driven by a servo motor, the PLC uses the CANOPEN bus to control the rotation angle of the servo, and reads the servo motor operating status in real time through the bus. The calculation of the hood projection angle needs to be combined with the average wind speed and direction values on site.

[0093] This solution has the following working process: when the air purifier equipment is in use, the equipment is turned on and the environmental and meteorological data are collected in real time through the air quality sensor and the wind speed and direction meter. After the operating conditions are met, the equipment automatically enters the operating state. The operating conditions include air humidity, pollutant concentration, average wind speed, etc. During the operation of the equipment, the wind speed control switches the fan to high, medium and low wind speeds according to the PM2.5 concentration measured by the inlet air quality sensor. The starting sequence for normal operation is: the air outlet valve is opened → the wind hood is rotated to the specified angle → the fan is turned on → the sterilization and dust removal module is turned on. During operation, the fan speed can be switched and adjusted in time according to the pollutant concentration. At the same time, the high-voltage power supply is controlled and the high The start / stop (power on / off) of the high-voltage power supply box is controlled by the output of the PLC. The PLC reads the working status of the high-voltage power supply in real time during its operation. If an alarm occurs, the high-voltage power supply will be stopped. When >70% of the high-voltage power supply cannot work normally, the equipment will shut down. The hood projection control collects the current wind speed and direction data in real time, and calculates the average wind speed and direction value per unit time. The hood projection angle is controlled according to the change in the angle between the equipment national control point connection line and the average wind direction. When the average wind speed is >4m / s, the equipment will shut down. At the same time, the hood opening is controlled by an electric air valve to open and close. The power is automatically closed during operation to achieve the hood air outlet control operation of the air purifier.

[0094] Unless otherwise defined, the technical or scientific terms used in the present invention shall have the ordinary meaning understood by persons having ordinary skills in the field to which the present invention belongs. The words "include" or "comprise" and the like used in the present invention mean that the elements or objects preceding the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. The words "connect" or "connected" and the like are not limited to physical or mechanical connections, but may also include electrical connections, whether direct or indirect. The words "up", "down", "left", "right", etc. are only used to indicate relative position relationships. When the absolute position of the object being described changes, the relative position relationship may also change accordingly.

[0095] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A hood control system for an air purifier, comprising: Data acquisition module, used to collect external environmental data; The main control module controls the hood projection angle and hood outlet wind speed according to the external environment data read by the data acquisition module; A component execution unit, used for adjusting the hood projection angle and the hood outlet wind speed; The data acquisition module includes an anemometer, an air quality sensor, and a rain and snow sensor; The main control module is internally provided with a PLC control system, which controls the component execution units; The component execution unit includes a servo drive module, a damper execution module, and a fan module. The servo drive module is used to control the rotation angle of the hood, the damper execution module controls the opening and closing of the hood opening, and the fan module controls the operation of the fan. The damper execution module is an actuator for controlling the damper. The hood adjustment angle is calculated based on the hood base angle, hood projection angle, and airflow deflection angle data. The main control module calculates and adjusts the hood projection angle based on the uploaded data information. The fan module drives the fan to operate again. The servo drive module drives the hood to rotate to the newly calculated projection angle based on the average wind speed and direction value of the anemometer over a period of time. This cycle is repeated in this way, with the projection angle adjusted once every 30 minutes. The hood angle calculation method is: Coordinate system and initial position definition: The center of the hood inlet is the coordinate origin O; the projection of the line connecting the center of the hood outlet and the center of the inlet in the horizontal plane is defined as the X-axis, with the positive direction from the inlet to the outlet; The Y axis is perpendicular to the X axis; the Z axis is perpendicular to the XY plane, with the positive direction being vertically upward; the wind direction angle α is defined as the angle between the wind direction and the X axis; The angle that the hood needs to rotate (around the Z axis) is defined as β; The initial wind direction angle is 0°, the target point is in the XZ plane, and the wind cap is initially pointing to the target point; The steps for calculating the hood projection angle are as follows:

1. Calculate the equipment reference angle between the national control point and the equipment point based on their longitude and latitude coordinates; 2. Calculate the average wind speed and direction value A per unit time based on the monitoring data of the anemometer; 3. Calculate the angle α between the average wind speed and direction per unit time and the equipment reference angle; According to the hood projection angle calculation formula β=Aα, after calculating β, the hood rotates to the preset position; The airflow deflection angle calculation method is: Calculation conditions: Ambient wind speed 3m / s, the horizontal distance between the target point and the device is approximately 130 meters; Through CFD simulation, the deflection angle of the airflow landing point is calculated based on the ambient wind effect at different angles on the hood jet; When δ is in the range of 0-45°, the γ angle and the δ angle can be approximately fitted into a linear relationship, γ = a × δ; The hood adjustment angle calculation: When the wind direction angle changes from 0° to α, the hood needs to be adjusted to β. To ensure that the airflow falls at the target point, α and β must satisfy the following formula: β = a × (α + β), that is, The hood angle adjustment direction is opposite to the wind direction angle; The hood adjustment angle range is [-45°~45°], if it exceeds this range, it will be adjusted to -45° or 45°; The following steps are involved: Step 1: Collect external data through anemometers, air quality sensors, and rain and snow sensors, and transmit and store them; Step 2: Based on the real-time collected environmental data, when the air quality and wind speed and direction meet the equipment operating conditions, the purifier will automatically turn on; Step 3: The damper actuator will confirm that the dampers are open, and the servo drive module will confirm whether the hood has rotated to the specified angle. When the dampers and hood reach the correct position, the fan will start to run. Step 4: After the fan is turned on normally, the internal IFD and CNT high-voltage power module group will start to enter the dust removal working mode; When the device is running and the average wind speed of the wind cap is greater than 4m / s, the fan device will stop running.

2. The control method based on the air purifier hood system according to claim 1, characterized in that: An electric air valve is provided at the hood opening on the outside of the hood, and the opening and closing of the hood are controlled by whether the electric air valve actuator is energized. The hood adopts a square outlet form and a slewing bearing driven by a servo motor to drive the hood to run to the calculated angle. An electric louver air valve is installed at the hood outlet to control and adjust the blowing direction of the hood opening. A drainage pipe is provided on the top of the hood for downward drainage of water.

3. The control method based on the air purifier hood control system according to claim 2, characterized in that: The hood's rotary mechanism is driven by a servo motor. The PLC uses the CANOPEN bus to control the servo's rotation angle and reads the servo motor's operating status in real time through the bus. The calculation of the hood's projection angle needs to be combined with the average wind speed and direction values on site.

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